Loop-antenna-frame construction



May 5, 1925.

IN V EN TOR A'zzwzz' .E. Wmrz; By M ATTORNEYS Patented May 5, 1925.

mo P ALB ERTE'. WYATT, OFJ'ERSEY CITY, NEW JERSEY.

Application filed March 13, 1924.

To all whom it mayconcem:

Be it known that: I, ALBERT E. lVYAT'r, a citizen of the United States, and a resident of Jersey -City,in the county: of Hudson and State ofNew Jersey, have invented a new and Improved Loop-AntennmFrame Construction, ofwhich the following is a full, clear, and exact description.

This invention relates to a'loop antenna frame construction, and. has for all-object the provision of a-si1nple,efiicient, strong and durable frame which can bereadily collapsed so asto be made easily. portable or capable of being packed away in a small space.

Another object concerns the provision of means whereby whenthe frame is to be extended into its no'rmal position this operation can be'easily. effected and the arms are locked securely in their expanded normal position but, nevertheless, can be easily collapsed when desired.

A further object concerns the provisionof means whereby the antenna wires on the loop can be heldin free :parallel spaced relation at all times, especially when the frame is extended.

A still further object concerns the provision of structural details whereby the-manufacturing costs can be reduced to a minimum.

The invention isillustrated in the drawings, of which Figure 1 is an elevation of the loop frame;

Fig. ing

9. is an elevation of-themain supportplate-showing the loop frame arms out Fig. 3 is an elevation of the opposite side of the main supporting plate;

i. 1g. 4 IS a section on the hne 4-4 of Fig. 2;

1 Q. 5 is a similar section showing the arms collapsed ig. 6 IS a section on the line 6-6 of l 1; and v Fig. 7 is a section on the line 77 of Fig. 1.

The form of the invention shown in the drawings is a preferred form, although it is understood that modifications in the construction and arrangement of the parts and in the character of the materials used may be adopted without departing from the spirit of the invention as set forth in the appended claims.

Serial No. 689,064.

The frame constructioncomprises a main supporting plate 1 to which are adaptedto be pivoted arms-:2, 8, 4 and5. The plate is cut: away as shown at 6, 7, S and 9 to form openings, and projecting lugs 01 ear portions such as 10 and 11 are disposed in pairs on opposite sidesof each opening to form pivotal supports for the arms. The inner ends of tlie arms are disposed to lie adjacent the inner edges such as 12 of the openings 6, 7, 8 and 9. The inner end of each frame is provided with a spring plate which is fastened atone end 13 thereto and extends across the under face of the arm. This portion of the plate, marked 14-, has a decided slope to it, and the other end is formed and bent around as at 15 to lie along the outside lateral face. The sloping portion of the spring plate, called-the locking plate, is provided with a groove 16 which in the normal position of the arm is adapted to receive and engage with the inner edge of the associated opening in the plate 1 so that during this engagement the arm isheld definitely and positively in its normal position. To release the arm so that it can be moved-to the position shown in Fig. 5, it is merely necessary tov pull back on the free end of the spring plate so as to release the edge of the main plate from engagement in the groove 16, whereupon the arm can be moved to the collapsed position shown in Fig. 5. This construction and operation is identical with respect to each of the arms. In the movement of the arms fronithe position shown in Fig. 5 to that shown in Fig. 4, it will be observed that each arm is swung upwardly and that the sloping spring plate onportion 14 of'the gages the inner edge of the openlngs 6, 7, 8 and 9, and this engagement causes the free end of the spring plate to move back until the edge of the opening is in position to engage the slope, whereupon the spring plate collapses back into position and firmly holds the arnis.

As shown in Figs. 1 and G, the antenna wires such as 17 are held in their proper spaced relation by means of flexible bands siich as 18, of any suitable material, which are disposed around the wires and which are provided throughout their length with an} suitable fastening means 19, which may he snap fasteners. These are used for the purpose of binding the band throughout its length together so as to space the wires in groupsof two or three whereby they may be maintained in tion, especially when the frame is expanded.

Asshown in Fig. 7 each arm is provided with a plurality of grooves, on its surface into which the wires are led, and then a plate such as 20 is placed over the surface ofthe arm and fastened thereto by a suitable means,such asa screw 21, so as to hold the wires in their proper position.-

It will, therefore, be observed that I have provided a simple and efficient construction of a loop antenna frame whichenables it to bereadily collapsed to occupya minimum space for storage or transmission and which, however, when expanded is maintained positively in this normal position by simple locking means which automatically engages upon expansion and can be very easily dis on the arms a'daptedto automatically lock. the arms tothe plate when the arms are moved to normal expanded position.

A loop antenna frame construction, which comprises a plate, a plurality of antenna supporting arms pivoted to and extending from said plate and adapted to lie in a normal position when expanded, SaJCl plate being cut away adjacent the inner ends of said armsto form an edge ad acent each ofsaid ends, a'spring member on the end of each of said arms adapted to engage said edge, and means on the spring member adapted to positively engage with the edge when the arms are in their normal position to lock the arms in said position.

this proper spaced rela 4. A loop antenna frame construction, whlch comprises a plate havlng an aperture cut therein, an antenna supportlng frame pivoted on the plate having a normal position in whiclithe inner end of the arm is disposed ad acent an edge of said aperture in said plate, and a spring plate mounted on the inner end of the arm and having a groove therein, said groove adapted to receive the edgeof the plate when the arm is in normal position to lock the arm in said position with respect to the plate.

7 5. A loop-antenna frame construction, whichcompri'ses a plate having an aperture cut therein, an antenna supporting frame pivoted 'on' the plate having a normal position in which the inner end of the arm is disposed adjacent an edge of said aperture in Sit-1d. plate, and a spring plate mounted on themner end of the arm and having a groove therein, said groove adapted to receive the edge of the plate when the arm is,

in normal position to lock the arm in'said position with respect to the plate, one side of said plate being free for movement whereby it can be withdrawn to disengage the edge from the groove so that the arm can be colla :sed or moved from its normal position.-

6. A loop. antenna frame construction, which comprises a plate having an opening out therein, an antenna supporting frame pivoted to the plate adjacent said opening and adapted to have a normal position in which its inner end lies ad acent one edge of said opening, and a spring plate fastened to the inner end of said arm, said plate having-a slight slope'with respect to the ends,

said plate having a groove therein, one. edge of said spring plate. being free, the arm adapted to be moved fromacollapsed to a normal position and in said movement permitting the engagement of the. edge of the main plate with the sloping portion of the spring plate whereby the edge rides along the spring'plate until it snaps into said groove whereby the arm is locked in its normal position with respect to the main plate.

ALBERT E. WYATT. 

